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<div class="title">samples/dnn/colorization.cpp</div>  </div>
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<div class="fragment"><div class="line"><span class="comment">// This file is part of OpenCV project.</span></div><div class="line"><span class="comment">// It is subject to the license terms in the LICENSE file found in the top-level directory</span></div><div class="line"><span class="comment">// of this distribution and at http://opencv.org/license.html</span></div><div class="line"></div><div class="line"><span class="preprocessor">#include &lt;<a class="code" href="../../d9/d8c/dnn_8hpp.html">opencv2/dnn.hpp</a>&gt;</span></div><div class="line"><span class="preprocessor">#include &lt;<a class="code" href="../../d1/d4f/imgproc_2include_2opencv2_2imgproc_8hpp.html">opencv2/imgproc.hpp</a>&gt;</span></div><div class="line"><span class="preprocessor">#include &lt;<a class="code" href="../../d4/dd5/highgui_8hpp.html">opencv2/highgui.hpp</a>&gt;</span></div><div class="line"><span class="preprocessor">#include &lt;iostream&gt;</span></div><div class="line"></div><div class="line"><span class="keyword">using namespace </span><a class="code" href="../../d2/d75/namespacecv.html">cv</a>;</div><div class="line"><span class="keyword">using namespace </span><a class="code" href="../../df/d57/namespacecv_1_1dnn.html">cv::dnn</a>;</div><div class="line"><span class="keyword">using namespace </span><a class="code" href="../../d8/dcc/namespacestd.html">std</a>;</div><div class="line"></div><div class="line"><span class="comment">// the 313 ab cluster centers from pts_in_hull.npy (already transposed)</span></div><div class="line"><span class="keyword">static</span> <span class="keywordtype">float</span> hull_pts[] = {</div><div class="line">    -90., -90., -90., -90., -90., -80., -80., -80., -80., -80., -80., -80., -80., -70., -70., -70., -70., -70., -70., -70., -70.,</div><div class="line">    -70., -70., -60., -60., -60., -60., -60., -60., -60., -60., -60., -60., -60., -60., -50., -50., -50., -50., -50., -50., -50., -50.,</div><div class="line">    -50., -50., -50., -50., -50., -50., -40., -40., -40., -40., -40., -40., -40., -40., -40., -40., -40., -40., -40., -40., -40., -30.,</div><div class="line">    -30., -30., -30., -30., -30., -30., -30., -30., -30., -30., -30., -30., -30., -30., -30., -20., -20., -20., -20., -20., -20., -20.,</div><div class="line">    -20., -20., -20., -20., -20., -20., -20., -20., -20., -10., -10., -10., -10., -10., -10., -10., -10., -10., -10., -10., -10., -10.,</div><div class="line">    -10., -10., -10., -10., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 10., 10., 10., 10., 10., 10., 10.,</div><div class="line">    10., 10., 10., 10., 10., 10., 10., 10., 10., 10., 10., 20., 20., 20., 20., 20., 20., 20., 20., 20., 20., 20., 20., 20., 20., 20.,</div><div class="line">    20., 20., 20., 30., 30., 30., 30., 30., 30., 30., 30., 30., 30., 30., 30., 30., 30., 30., 30., 30., 30., 30., 40., 40., 40., 40.,</div><div class="line">    40., 40., 40., 40., 40., 40., 40., 40., 40., 40., 40., 40., 40., 40., 40., 40., 50., 50., 50., 50., 50., 50., 50., 50., 50., 50.,</div><div class="line">    50., 50., 50., 50., 50., 50., 50., 50., 50., 60., 60., 60., 60., 60., 60., 60., 60., 60., 60., 60., 60., 60., 60., 60., 60., 60.,</div><div class="line">    60., 60., 60., 70., 70., 70., 70., 70., 70., 70., 70., 70., 70., 70., 70., 70., 70., 70., 70., 70., 70., 70., 70., 80., 80., 80.,</div><div class="line">    80., 80., 80., 80., 80., 80., 80., 80., 80., 80., 80., 80., 80., 80., 80., 80., 90., 90., 90., 90., 90., 90., 90., 90., 90., 90.,</div><div class="line">    90., 90., 90., 90., 90., 90., 90., 90., 90., 100., 100., 100., 100., 100., 100., 100., 100., 100., 100., 50., 60., 70., 80., 90.,</div><div class="line">    20., 30., 40., 50., 60., 70., 80., 90., 0., 10., 20., 30., 40., 50., 60., 70., 80., 90., -20., -10., 0., 10., 20., 30., 40., 50.,</div><div class="line">    60., 70., 80., 90., -30., -20., -10., 0., 10., 20., 30., 40., 50., 60., 70., 80., 90., 100., -40., -30., -20., -10., 0., 10., 20.,</div><div class="line">    30., 40., 50., 60., 70., 80., 90., 100., -50., -40., -30., -20., -10., 0., 10., 20., 30., 40., 50., 60., 70., 80., 90., 100., -50.,</div><div class="line">    -40., -30., -20., -10., 0., 10., 20., 30., 40., 50., 60., 70., 80., 90., 100., -60., -50., -40., -30., -20., -10., 0., 10., 20.,</div><div class="line">    30., 40., 50., 60., 70., 80., 90., 100., -70., -60., -50., -40., -30., -20., -10., 0., 10., 20., 30., 40., 50., 60., 70., 80., 90.,</div><div class="line">    100., -80., -70., -60., -50., -40., -30., -20., -10., 0., 10., 20., 30., 40., 50., 60., 70., 80., 90., -80., -70., -60., -50.,</div><div class="line">    -40., -30., -20., -10., 0., 10., 20., 30., 40., 50., 60., 70., 80., 90., -90., -80., -70., -60., -50., -40., -30., -20., -10.,</div><div class="line">    0., 10., 20., 30., 40., 50., 60., 70., 80., 90., -100., -90., -80., -70., -60., -50., -40., -30., -20., -10., 0., 10., 20., 30.,</div><div class="line">    40., 50., 60., 70., 80., 90., -100., -90., -80., -70., -60., -50., -40., -30., -20., -10., 0., 10., 20., 30., 40., 50., 60., 70.,</div><div class="line">    80., -110., -100., -90., -80., -70., -60., -50., -40., -30., -20., -10., 0., 10., 20., 30., 40., 50., 60., 70., 80., -110., -100.,</div><div class="line">    -90., -80., -70., -60., -50., -40., -30., -20., -10., 0., 10., 20., 30., 40., 50., 60., 70., 80., -110., -100., -90., -80., -70.,</div><div class="line">    -60., -50., -40., -30., -20., -10., 0., 10., 20., 30., 40., 50., 60., 70., -110., -100., -90., -80., -70., -60., -50., -40., -30.,</div><div class="line">    -20., -10., 0., 10., 20., 30., 40., 50., 60., 70., -90., -80., -70., -60., -50., -40., -30., -20., -10., 0.</div><div class="line">};</div><div class="line"></div><div class="line"><span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> **argv)</div><div class="line">{</div><div class="line">    <span class="keyword">const</span> <span class="keywordtype">string</span> about =</div><div class="line">        <span class="stringliteral">&quot;This sample demonstrates recoloring grayscale images with dnn.\n&quot;</span></div><div class="line">        <span class="stringliteral">&quot;This program is based on:\n&quot;</span></div><div class="line">        <span class="stringliteral">&quot;  http://richzhang.github.io/colorization\n&quot;</span></div><div class="line">        <span class="stringliteral">&quot;  https://github.com/richzhang/colorization\n&quot;</span></div><div class="line">        <span class="stringliteral">&quot;Download caffemodel and prototxt files:\n&quot;</span></div><div class="line">        <span class="stringliteral">&quot;  http://eecs.berkeley.edu/~rich.zhang/projects/2016_colorization/files/demo_v2/colorization_release_v2.caffemodel\n&quot;</span></div><div class="line">        <span class="stringliteral">&quot;  https://raw.githubusercontent.com/richzhang/colorization/master/colorization/models/colorization_deploy_v2.prototxt\n&quot;</span>;</div><div class="line">    <span class="keyword">const</span> <span class="keywordtype">string</span> keys =</div><div class="line">        <span class="stringliteral">&quot;{ h help |                                    | print this help message }&quot;</span></div><div class="line">        <span class="stringliteral">&quot;{ proto  | colorization_deploy_v2.prototxt    | model configuration }&quot;</span></div><div class="line">        <span class="stringliteral">&quot;{ model  | colorization_release_v2.caffemodel | model weights }&quot;</span></div><div class="line">        <span class="stringliteral">&quot;{ image  | space_shuttle.jpg                  | path to image file }&quot;</span></div><div class="line">        <span class="stringliteral">&quot;{ opencl |                                    | enable OpenCL }&quot;</span>;</div><div class="line">    <a name="_a0"></a><a class="code" href="../../d0/d2e/classcv_1_1CommandLineParser.html">CommandLineParser</a> parser(argc, argv, keys);</div><div class="line">    parser.about(about);</div><div class="line">    <span class="keywordflow">if</span> (parser.has(<span class="stringliteral">&quot;help&quot;</span>))</div><div class="line">    {</div><div class="line">        parser.printMessage();</div><div class="line">        <span class="keywordflow">return</span> 0;</div><div class="line">    }</div><div class="line">    <span class="keywordtype">string</span> modelTxt = <a name="a1"></a><a class="code" href="../../d6/dba/group__core__utils__samples.html#ga3a33b00033b46c698ff6340d95569c13">samples::findFile</a>(parser.get&lt;<span class="keywordtype">string</span>&gt;(<span class="stringliteral">&quot;proto&quot;</span>));</div><div class="line">    <span class="keywordtype">string</span> modelBin = <a class="code" href="../../d6/dba/group__core__utils__samples.html#ga3a33b00033b46c698ff6340d95569c13">samples::findFile</a>(parser.get&lt;<span class="keywordtype">string</span>&gt;(<span class="stringliteral">&quot;model&quot;</span>));</div><div class="line">    <span class="keywordtype">string</span> imageFile = <a class="code" href="../../d6/dba/group__core__utils__samples.html#ga3a33b00033b46c698ff6340d95569c13">samples::findFile</a>(parser.get&lt;<span class="keywordtype">string</span>&gt;(<span class="stringliteral">&quot;image&quot;</span>));</div><div class="line">    <span class="keywordtype">bool</span> <a name="a2"></a><a class="code" href="../../dc/d83/group__core__opencl.html#gadb3b41d4552e9db7887855e3a1b2af37">useOpenCL</a> = parser.has(<span class="stringliteral">&quot;opencl&quot;</span>);</div><div class="line">    <span class="keywordflow">if</span> (!parser.check())</div><div class="line">    {</div><div class="line">        parser.printErrors();</div><div class="line">        <span class="keywordflow">return</span> 1;</div><div class="line">    }</div><div class="line"></div><div class="line">    <a name="_a3"></a><a class="code" href="../../d3/d63/classcv_1_1Mat.html">Mat</a> img = <a name="a4"></a><a class="code" href="../../d4/da8/group__imgcodecs.html#ga288b8b3da0892bd651fce07b3bbd3a56">imread</a>(imageFile);</div><div class="line">    <span class="keywordflow">if</span> (img.<a name="a5"></a><a class="code" href="../../d3/d63/classcv_1_1Mat.html#abbec3525a852e77998aba034813fded4">empty</a>())</div><div class="line">    {</div><div class="line">        cout &lt;&lt; <span class="stringliteral">&quot;Can&#39;t read image from file: &quot;</span> &lt;&lt; imageFile &lt;&lt; endl;</div><div class="line">        <span class="keywordflow">return</span> 2;</div><div class="line">    }</div><div class="line"></div><div class="line">    <span class="comment">// fixed input size for the pretrained network</span></div><div class="line">    <span class="keyword">const</span> <span class="keywordtype">int</span> W_in = 224;</div><div class="line">    <span class="keyword">const</span> <span class="keywordtype">int</span> H_in = 224;</div><div class="line">    <a name="_a6"></a><a class="code" href="../../db/d30/classcv_1_1dnn_1_1Net.html">Net</a> net = <a name="a7"></a><a class="code" href="../../d6/d0f/group__dnn.html#ga29d0ea5e52b1d1a6c2681e3f7d68473a">dnn::readNetFromCaffe</a>(modelTxt, modelBin);</div><div class="line">    <span class="keywordflow">if</span> (useOpenCL)</div><div class="line">        net.<a name="a8"></a><a class="code" href="../../db/d30/classcv_1_1dnn_1_1Net.html#a9dddbefbc7f3defbe3eeb5dc3d3483f4">setPreferableTarget</a>(<a name="a9"></a><a class="code" href="../../d6/d0f/group__dnn.html#gga709af7692ba29788182cf573531b0ff5a45f8ea53f004e52665078a88167c7c08">DNN_TARGET_OPENCL</a>);</div><div class="line"></div><div class="line">    <span class="comment">// setup additional layers:</span></div><div class="line">    <span class="keywordtype">int</span> sz[] = {2, 313, 1, 1};</div><div class="line">    <span class="keyword">const</span> <a class="code" href="../../d3/d63/classcv_1_1Mat.html">Mat</a> pts_in_hull(4, sz, <a name="a10"></a><a class="code" href="../../d1/d1b/group__core__hal__interface.html#ga4a3def5d72b74bed31f5f8ab7676099c">CV_32F</a>, hull_pts);</div><div class="line">    <a class="code" href="../../dc/d84/group__core__basic.html#ga6395ca871a678020c4a31fadf7e8cc63">Ptr&lt;dnn::Layer&gt;</a> class8_ab = net.<a name="a11"></a><a class="code" href="../../db/d30/classcv_1_1dnn_1_1Net.html#a70aec7f768f38c32b1ee25f3a56526df">getLayer</a>(<span class="stringliteral">&quot;class8_ab&quot;</span>);</div><div class="line">    class8_ab-&gt;blobs.push_back(pts_in_hull);</div><div class="line">    <a class="code" href="../../dc/d84/group__core__basic.html#ga6395ca871a678020c4a31fadf7e8cc63">Ptr&lt;dnn::Layer&gt;</a> conv8_313_rh = net.<a class="code" href="../../db/d30/classcv_1_1dnn_1_1Net.html#a70aec7f768f38c32b1ee25f3a56526df">getLayer</a>(<span class="stringliteral">&quot;conv8_313_rh&quot;</span>);</div><div class="line">    conv8_313_rh-&gt;blobs.push_back(<a class="code" href="../../d3/d63/classcv_1_1Mat.html">Mat</a>(1, 313, <a class="code" href="../../d1/d1b/group__core__hal__interface.html#ga4a3def5d72b74bed31f5f8ab7676099c">CV_32F</a>, <a name="a12"></a><a class="code" href="../../dc/d84/group__core__basic.html#ga599fe92e910c027be274233eccad7beb">Scalar</a>(2.606)));</div><div class="line"></div><div class="line">    <span class="comment">// extract L channel and subtract mean</span></div><div class="line">    <a class="code" href="../../d3/d63/classcv_1_1Mat.html">Mat</a> lab, L, input;</div><div class="line">    img.<a name="a13"></a><a class="code" href="../../d3/d63/classcv_1_1Mat.html#adf88c60c5b4980e05bb556080916978b">convertTo</a>(img, <a class="code" href="../../d1/d1b/group__core__hal__interface.html#ga4a3def5d72b74bed31f5f8ab7676099c">CV_32F</a>, 1.0/255);</div><div class="line">    <a name="a14"></a><a class="code" href="../../d8/d01/group__imgproc__color__conversions.html#ga397ae87e1288a81d2363b61574eb8cab">cvtColor</a>(img, lab, <a name="a15"></a><a class="code" href="../../d8/d01/group__imgproc__color__conversions.html#gga4e0972be5de079fed4e3a10e24ef5ef0a860b72b4741c431e81340fafef5eca24">COLOR_BGR2Lab</a>);</div><div class="line">    <a name="a16"></a><a class="code" href="../../d2/de8/group__core__array.html#gacc6158574aa1f0281878c955bcf35642">extractChannel</a>(lab, L, 0);</div><div class="line">    <a name="a17"></a><a class="code" href="../../da/d54/group__imgproc__transform.html#ga47a974309e9102f5f08231edc7e7529d">resize</a>(L, input, <a name="a18"></a><a class="code" href="../../dc/d84/group__core__basic.html#ga346f563897249351a34549137c8532a0">Size</a>(W_in, H_in));</div><div class="line">    input -= 50;</div><div class="line"></div><div class="line">    <span class="comment">// run the L channel through the network</span></div><div class="line">    <a class="code" href="../../d3/d63/classcv_1_1Mat.html">Mat</a> inputBlob = <a name="a19"></a><a class="code" href="../../d6/d0f/group__dnn.html#ga29f34df9376379a603acd8df581ac8d7">blobFromImage</a>(input);</div><div class="line">    net.<a name="a20"></a><a class="code" href="../../db/d30/classcv_1_1dnn_1_1Net.html#a5e74adacffd6aa53d56046581de7fcbd">setInput</a>(inputBlob);</div><div class="line">    <a class="code" href="../../d3/d63/classcv_1_1Mat.html">Mat</a> result = net.<a name="a21"></a><a class="code" href="../../db/d30/classcv_1_1dnn_1_1Net.html#a98ed94cb6ef7063d3697259566da310b">forward</a>();</div><div class="line"></div><div class="line">    <span class="comment">// retrieve the calculated a,b channels from the network output</span></div><div class="line">    <a name="_a22"></a><a class="code" href="../../d6/d50/classcv_1_1Size__.html">Size</a> siz(result.<a name="a23"></a><a class="code" href="../../d3/d63/classcv_1_1Mat.html#a146f8e8dda07d1365a575ab83d9828d1">size</a>[2], result.<a class="code" href="../../d3/d63/classcv_1_1Mat.html#a146f8e8dda07d1365a575ab83d9828d1">size</a>[3]);</div><div class="line">    <a class="code" href="../../d3/d63/classcv_1_1Mat.html">Mat</a> a = <a class="code" href="../../d3/d63/classcv_1_1Mat.html">Mat</a>(siz, <a class="code" href="../../d1/d1b/group__core__hal__interface.html#ga4a3def5d72b74bed31f5f8ab7676099c">CV_32F</a>, result.<a name="a24"></a><a class="code" href="../../d3/d63/classcv_1_1Mat.html#a13acd320291229615ef15f96ff1ff738">ptr</a>(0,0));</div><div class="line">    <a class="code" href="../../d3/d63/classcv_1_1Mat.html">Mat</a> b = <a class="code" href="../../d3/d63/classcv_1_1Mat.html">Mat</a>(siz, <a class="code" href="../../d1/d1b/group__core__hal__interface.html#ga4a3def5d72b74bed31f5f8ab7676099c">CV_32F</a>, result.<a class="code" href="../../d3/d63/classcv_1_1Mat.html#a13acd320291229615ef15f96ff1ff738">ptr</a>(0,1));</div><div class="line">    <a class="code" href="../../da/d54/group__imgproc__transform.html#ga47a974309e9102f5f08231edc7e7529d">resize</a>(a, a, img.<a class="code" href="../../d3/d63/classcv_1_1Mat.html#a146f8e8dda07d1365a575ab83d9828d1">size</a>());</div><div class="line">    <a class="code" href="../../da/d54/group__imgproc__transform.html#ga47a974309e9102f5f08231edc7e7529d">resize</a>(b, b, img.<a class="code" href="../../d3/d63/classcv_1_1Mat.html#a146f8e8dda07d1365a575ab83d9828d1">size</a>());</div><div class="line"></div><div class="line">    <span class="comment">// merge, and convert back to BGR</span></div><div class="line">    <a class="code" href="../../d3/d63/classcv_1_1Mat.html">Mat</a> color, chn[] = {L, a, b};</div><div class="line">    <a name="a25"></a><a class="code" href="../../d2/de8/group__core__array.html#ga7d7b4d6c6ee504b30a20b1680029c7b4">merge</a>(chn, 3, lab);</div><div class="line">    <a class="code" href="../../d8/d01/group__imgproc__color__conversions.html#ga397ae87e1288a81d2363b61574eb8cab">cvtColor</a>(lab, color, <a name="a26"></a><a class="code" href="../../d8/d01/group__imgproc__color__conversions.html#gga4e0972be5de079fed4e3a10e24ef5ef0a966fd47d10ad71c4220b3ef9f1ac5774">COLOR_Lab2BGR</a>);</div><div class="line"></div><div class="line">    <a name="a27"></a><a class="code" href="../../d7/dfc/group__highgui.html#ga453d42fe4cb60e5723281a89973ee563">imshow</a>(<span class="stringliteral">&quot;color&quot;</span>, color);</div><div class="line">    <a class="code" href="../../d7/dfc/group__highgui.html#ga453d42fe4cb60e5723281a89973ee563">imshow</a>(<span class="stringliteral">&quot;original&quot;</span>, img);</div><div class="line">    <a name="a28"></a><a class="code" href="../../d7/dfc/group__highgui.html#ga5628525ad33f52eab17feebcfba38bd7">waitKey</a>();</div><div class="line">    <span class="keywordflow">return</span> 0;</div><div class="line">}</div></div><!-- fragment --> </div><!-- contents -->
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